my first CUDA external

I working on the development of a fast motion tracking external for my master thesis

I am using the cv.jit library from JM Pelletier for a long time and now I trying to implement my own algorithm in CUDA to get more and more FPS…

for the moment, I wrote a GLSL shader which bring to light the blobs center in a grey-scale image
and I have implemented this algorithm in a Jitter CPU-only external with which I reach about 300 fps on a 320×240 image

I also can build an external using CUDA API, but for the moment I am suffering from memory access problem and the external is pretty slow… but I am sure it can be improve

I am working under windows XP but I thing the code could be easily compile for Universal Binary

now I am looking for someone who is interessed in the development of some external using CUDA and who can help me to improve my code

can I check out your shader? I use the CV objects and am trying to move everything into GPU so that I can use my cpu for mainly audio and gpu for visual.

I am really interested in CUDA and I hope to get into it soon, I am just getting into GLSL programming, and I am loving it so far. Id love to get into external programming as well, but Im not sure I will have time soon.

Anyway, if your willing to I would absolutely love to try out your CV GLSL. I really hope in the next year to make a ton of really high end shaders and calculations. It would be a huge help to see more CV in GLSL. I learned a ton from looking at Andrews HSflow CV in GLSL implementation. If you haven’t checked it out make sure you grab it, its in the jitter forum under sharing new distortions.

of course I can send to you my shader but it’s not really a "CV GLSL" because i’ve implented my own algorithm which send out the center’s coordinates of elliptic blobs in an image. it’s not the centroid but the center of the blob’s bounding box.
I’ve implemented a new algorithm last night in a CUDA external which runs at 100 fps in 320×240 in my Geforce 8600GT (much slower than the cv.jit !)
For the moment, the shader is broken but I will restore it with the new algorithm today if I would have time enough an then I could send it to you with an help patch.
but with shader the problem is always to get the picture back to the CPU, in my case, i needed to build a 3 planes 1 dimension matrix with the coordinates of the tracked points (just like cv.jit.centroids ) but in GLSL, the readback function slows down the FPS and this is why i decided to put it in a CUDA external
but I will check the HSFlow glsl implementation now, I didn’t heard about it before, thanks
and to conclude, I am very impatient to try openCL with which we can do what CUDA does but not only on Nvidia card

Are you using Max 5 ? on Windows ? with an Nvidia graphic card ?
if so i could sent to you my external too.

Hey, if your serious, I am goign to be selling it right after I get my new one. Ill probably let it go for under a grand, Ill have to check ebay to see what they are going for. I just have to wait a week to get this repair part to fix the keyboard, one of they keys isn’t working and I am repairing it before I sell it. Its in pretty good condition and has osx and windows on it. And its a decent computer, 2.16ghz 2gram radeon 1600x. only like a year and a half old or less. Well anyway, if you are indeed interested hit me up nico@axiom-crux.net, or you can email me the external if you dont want to post it to the list